Distinct neuronal populations contribute to trace conditioning and extinction learning in the hippocampal CA1

Rebecca A. Mount, Sudiksha Sridhar, Kyle R. Hansen, Ali I. Mohammed, Moona Abdulkerim, Robb Kessel, Bobak Nazer, Howard J. Gritton, Xue Han

Research output: Contribution to journalArticlepeer-review

Abstract

Trace conditioning and extinction learning depend on the hippocampus, but it remains unclear how neural activity in the hippocampus is modulated during these two different behavioral processes. To explore this question, we performed calcium imaging from a large number of individual CA1 neurons during both trace eye-blink conditioning and subsequent extinction learning in mice. Our findings reveal that distinct populations of CA1 cells contribute to trace conditioned learning versus extinction learning, as learning emerges. Furthermore, we examined network connectivity by calculating co-activity between CA1 neuron pairs and found that CA1 network connectivity patterns also differ between conditioning and extinction, even though the overall connectivity density remains constant. Together, our results demonstrate that distinct populations of hippocampal CA1 neurons, forming different sub-networks with unique connectivity patterns, encode different aspects of learning.

Original languageEnglish (US)
Article numbere56491
JournaleLife
Volume10
DOIs
StatePublished - 2021
Externally publishedYes

ASJC Scopus subject areas

  • General Neuroscience
  • General Biochemistry, Genetics and Molecular Biology
  • General Immunology and Microbiology

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